/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.attribute.annotation.visitor;

import a.annotation.proguard.classfile.attribute.annotation.Annotation;
import proguard.classfile.Clazz;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.ClassVisitor;

/**
 * This AnnotationVisitor delegates all visits to a given ClassVisitor. The latter visits the class of each visited
 * annotation, although never twice in a row.
 *
 * @author Eric Lafortune
 */
public class AnnotationToAnnotatedClassVisitor extends SimplifiedVisitor implements AnnotationVisitor {
    private final ClassVisitor classVisitor;

    private Clazz lastVisitedClass;

    public AnnotationToAnnotatedClassVisitor(ClassVisitor classVisitor) {
        this.classVisitor = classVisitor;
    }

    // Implementations for AnnotationVisitor.

    public void visitAnnotation(Clazz clazz, Annotation annotation) {
        if (!clazz.equals(lastVisitedClass)) {
            clazz.accept(classVisitor);

            lastVisitedClass = clazz;
        }
    }
}
